3865648551 has 8 divisors (see below), whose sum is σ = 5279910384. Its totient is φ = 2514242880.

The previous prime is 3865648403. The next prime is 3865648561. The reversal of 3865648551 is 1558465683.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3865648551 - 2¹⁴ = 3865632167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3865648494 and 3865648503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865648561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15713896 + ... + 15714141.

It is an arithmetic number, because the mean of its divisors is an integer number (659988798).

Almost surely, 2^3865648551 is an apocalyptic number.

3865648551 is a deficient number, since it is larger than the sum of its proper divisors (1414261833).

3865648551 is a wasteful number, since it uses less digits than its factorization.

3865648551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31428081.

The product of its digits is 3456000, while the sum is 51.

The square root of 3865648551 is about 62174.3399723712. The cubic root of 3865648551 is about 1569.4258047387.

The spelling of 3865648551 in words is "three billion, eight hundred sixty-five million, six hundred forty-eight thousand, five hundred fifty-one".